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Service bulletins for the 2013 Buick Regal

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

1884 on file from NHTSA, as of 2026-10-19.

By type

By component

By trouble code

By topic

Only bulletins with component: Transmission and driveline are shown. Show all

Bulletins, newest first
PI0281L2025-06-12. Service bulletin. STEERING; POWER TRAIN; SUSPENSION. This preliminary informational (PI) bulletin provides information to dealership personnel that may be helpful when addressing underbody component corrosion with customers.
09-06-04-026Z2025-01-23. Service bulletin. ENGINE; POWER TRAIN; ELECTRICAL SYSTEM. This bulletin provides information on identifying Non-GM Engine Calibrations for Gasoline Engines using the Tech 2 or GDS 2.
08-07-30-035I2024-12-19. Service bulletin. POWER TRAIN. This service bulletin provides information on the harmful effects of ethylene glycol in transmission fluid.
04-06-01-029K2024-12-04. Service bulletin. POWER TRAIN; STEERING; ENGINE. This informational bulletin explains Unscheduled Supplemental Services and the importance of GM Simplified Maintenance Schedules.
24-NA-2232024-11-19. Service bulletin. POWER TRAIN. This service bulletin informs the technician of an alternate lift procedure that has been developed when the lift plate does not fit the top of the transmission case for 6T30, 6T35, 6T40, 6T45, and 6T50 Transmissions.
20-NA-1382024-11-05. Service bulletin. POWER TRAIN; ENGINE. This bulletin provides information on Policies Applicable to All U.S. Dealers for Engine and Transmission Assembly Replacement Under Warranty, Policy or Customer Enthusiasm and information on Submission of Warranty Transaction in Global Warranty Management.
08-07-30-026I2024-10-24. Service bulletin. POWER TRAIN. This service bulletin provides information on some vehicles that may rock or move slightly forward or rearward while in Park at start up after cold soak. This condition may be accompanied by a clunk noise. This is a slight movement that is more often seen visually, rather than felt, when viewed from the outside and using the auto-start feature, if equipped.
24-NA-1412024-08-15. Service bulletin. POWER TRAIN. GM is receiving damaged (cracked or broken) transmission cores returned to the reman facilities. The damage is being caused either in the removal process by the technician, or inadequate packaging or shipping. This bulletin advises the dealers to be more careful not to damage the transmissions during removal and to package the core properly for return.
99-04-20-002O2024-07-30. Service bulletin. POWER TRAIN. This service bulletin provides information on Driveline Clunk Noise and what is acceptable and what is considered normal operation.
08-07-30-035H2024-06-07. Service bulletin. POWER TRAIN. This bulletin provides information on the harmful effects of water or ethylene glycol in transmission fluid.
15-00-89-004G2024-05-15. Service bulletin. ENGINE; SUSPENSION; POWER TRAIN. This service bulletin provides technicians with information to help identify the differences between what is considered a fluid leak, and what is considered fluid seepage.
PIE02762024-04-08. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:FLUID/LUBRICANT. Engineering Information.
21-NA-2452024-04-05. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN:AUTOMATIC TRANSMISSION:LEVER AND LINKAGE:COLUMN SHIFT; POWER TRAIN:AUTOMATIC TRANSMISSION:INTERNAL:PARK PAWL; ELECTRICAL SYSTEM:ADAS:PARKING ASSIST:WARNING; POWER TRAIN. This service bulletin provides repair information to correct a customer concern of seeing a Shift to Park Message Displayed in DIC.
16-NA-3382024-02-17. Service bulletin. POWER TRAIN; ENGINE AND ENGINE COOLING. This Warranty Admin service bulletin provides guidelines for Dealers Not Required and for Dealers Required to Contact the PQC for engine or transmission assembly replacement and explains the PQC process, GWM Transaction submission, vehicle service record retention and proper handling of assembly returns for Canadian Dealers only.
990420002I2024-02-12. Service bulletin. POWER TRAIN. Information on Driveline Clunk Noise
990420002H2024-02-12. Service bulletin. POWER TRAIN. Information on Driveline Clunk Noise
PI1394B2024-02-02. Service bulletin. POWER TRAIN; ENGINE AND ENGINE COOLING. This PI bulletin advises the technician on the proper way to install the pistons in an engine.
13282A2023-12-11. Service bulletin. POWER TRAIN. Service Update for Inventory Vehicles Only Transmission Snap Ring Misalignment Expires September 30, 2014 - Equipped with 6T40 Automatic Transmission (MHH)
132822023-12-11. Service bulletin. POWER TRAIN. Service Update for Inventory Vehicles Only Transmission Snap Ring Misalignment Expires September 30, 2014 - Equipped with 6T40 Automatic Transmission (MHH)
090730018D2023-12-11. Service bulletin. POWER TRAIN. Change in Automatic Transmission Add Condition Documentation and Claim Submission
090730018C2023-12-11. Service bulletin. POWER TRAIN. Warranty Administration ? Change in Automatic Transmission Add Condition Documentation and Claim Submission
990420002I2023-12-11. Service bulletin. POWER TRAIN:DRIVELINE. Information on Driveline Clunk Noise
990420002H2023-12-11. Service bulletin. POWER TRAIN:DRIVELINE. Information on Driveline Clunk Noise
23-NA-1622023-12-09. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM; POWER TRAIN. This service bulletin advises the tech of updated Diagnostic procedures in Service Information (SI) to avoid misdiagnosis when addressing a customer concern of Service Rear Axle Message displayed on the Driver information Center (DIC).
12222B2023-12-04. Service bulletin. POWER TRAIN; EQUIPMENT. Incorrect Material Used for Transmission O-Ring

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.